Cryogenic valves for hydrogen - General technical specifications
1 Scope
This document specifies the structural type, technical requirements, inspection and test items as well as the requirements, end-of-manufacturing inspection and type inspection, marking, packaging, storage and transportation requirements of cryogenic valves for hydrogen (hereinafter referred to as "valves").
This document is applicable to welded or flanged globe valves, check valves, ball valves, butterfly valves, pneumatic control valves and emergency shutoff valves with medium temperature not higher than -196℃ and not lower than the boiling point temperature of liquid or cold hydrogen at standard atmospheric pressure, nominal pressure not higher than PN160, and pressure class not higher than Class 900.
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. The following documents contain provisions which, through reference in this text, constitute provisions of this document.
GB/T 150.4-2011 Pressure vessels - Part 4: Fabrication, inspection and testing, and acceptance
GB/T 228.1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature
GB/T 229 Metallic materials - Charpy pendulum impact test method
GB/T 1954 Methods of measurement for ferrite content in austenitic Cr-Ni stainless steel weld metals
GB/T 2423.5 Environmental testing - Part 2: Test methods - Test Ea and guidance: Shock
GB/T 2423.10 Environmental testing - Part 2: Test methods - Test Fc: Vibration (sinusoidal)
GB/T 2653 Bend test methods on welded joints
GB/T 3836.1 Explosive atmospheres - Part 1: Equipment - General requirements
GB/T 4208 Degrees of protection provided by enclosure (IP code)
GB/T 4213-2008 Pneumatic industrial process control valves
GB/T 9124 (All parts) Steel pipe flanges
GB/T 12220 Industrial valves - Marking
GB/T 12221 Metal valves - Face to face, end to end, center to face and center to end dimensions
GB/T 12222 Multi-turn valve actuator attachments
GB/T 12223 Part-turn valve actuator attachments
GB/T 12224-2015 General requirements for industrial steel valves
GB/T 12235 Steel globe valves and lift check valve for petroleum, petrochemical and allied industries
GB/T 12236 Steel swing check valve for petroleum petrochemical and allied industries
GB/T 12237 Steel ball valves for petroleum, petrochemical and allied industries
GB/T 13305 Micrographic method for determining area content of the α-phases in stainless steels
NB/T 47013.2-2015 Nondestructive testing of pressure equipment - Part 2: Radiographic testing
NB/T 47013.5-2015 Nondestructive testing of pressure equipments - Part 5: Penetrant testing
NB/T 47014-2011 Welding procedure qualification for pressure equipment
T/CGMA 0405-2022 Cryogenic valves for hydrogen - General test method
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 21465 as well as the following apply.
3.1
maximum allowable working pressure; MAWP
maximum allowable working pressure of the pressure-bearing components of the valve at 20℃
Note: It is the minimum value among the maximum allowable working pressures of all pressure-bearing components of the valve
3.2
rated minimum temperature
minimum service temperature of the valve determined by the valve manufacturer
3.3
body/bonnet extension
proper extension between the body and the bonnet connecting end or at the bonnet to prevent the stem packing and valve operating mechanism function from being damaged or impaired by the temperature influence of the cryogenic medium in the body
3.4
gas column
heat-insulated gas column formed by cryogenic liquid medium in body/bonnet extension
3.5
cryogenic treatment
treatment process as following: Immerse the parts in liquid nitrogen for cooling until their temperature is stable at -196℃, then maintain such temperature for 2h~4h according to the thickness of the parts, and then take them out to return to room temperature naturally
3.6
heat insulation
heat insulation layer set outside the cryogenic valve to prevent the heat exchange between the cryogenic medium and the outside and avoid two-phase flow in the body
3.7
vacuum jacket
heat insulation measure of arranging a metal jacket outside the cryogenic valve and vacuumizing the space between the outer wall of valve and the inner wall of jacket to limit the heat exchange between the cryogenic medium and the outside
4 Type of construction
Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Type of construction 5 Technical requirements 5.1 General requirements 5.2 Structural length 5.3 Connecting end 5.4 Body and bonnet 5.5 Stem 5.6 Sealing pair 5.7 Bellows assemblies 5.8 Packing and stuffing box 5.9 Driving device and operation 5.10 Material 5.11 Welding 5.12 Appearance quality 5.13 Non-destructive testing 5.14 Requirements for vibration resistance and impact tests 5.15 Explosion-proof and protection requirements 6 Inspection and test items and requirements 6.1 Safety instruction 6.2 Marking inspection 6.3 Appearance quality inspection 6.4 Dimension inspection 6.5 Chemical composition analysis 6.6 Mechanical property test 6.7 Normal temperature performance test 6.8 Shell crack resistance test 6.9 Cryogenic performance test 6.10 Non-destructive testing 6.11 Anti-static test 6.12 Vibration resistance test 6.13 Impact test 6.14 Fire test 6.15 Degreasing inspection 7 Inspection rules 7.1 End-of-manufacturing inspection 7.2 Type inspection 8 Marking 8.1 General requirements 8.2 Marks on body 8.3 Marks on nameplate 8.4 Other marks 9 Packaging, storage and transportation Annex A (Informative) Recommended minimum length of body/bonnet extension Annex B (Informative) Guideline for calculation of stem strength Annex C (Informative) Recommended designations of metallic materials for main parts of valves Annex D (Informative) Comparison between relevant domestic and foreign standards Bibliography Figure 1 Cryogenic globe valve with vacuum jacket Figure 2 Cryogenic swing check valve with vacuum jacket Figure 3 Cryogenic lift check valve with vacuum jacket Figure 4 Cryogenic ball valve with vacuum jacket Figure 5 Cryogenic butterfly valve Figure 6 Cryogenic pneumatic control valve with vacuum jacket Figure 7 Cryogenic emergency shutoff valve (straight travel) with vacuum jacket Figure 8 Cryogenic emergency shutoff valve (angular travel) with vacuum jacket Figure A.1 Schematic diagram for elongation of body/bonnet extension Table 1 Maximum operating force allowed upon valve opening or closing Table 2 Impact performance requirements for pressure-bearing components of cryogenic valves for hydrogen Table 3 Deposited metal test requirements Table 4 Welding procedure qualification test requirements for pressure-bearing components of valves Table 5 Normal temperature performance test items and test result requirements of globe valve Table 6 Normal temperature performance test items and test result requirements of check valve Table 7 Normal temperature performance test items and test result requirements of ball valve Table 8 Normal temperature performance test items and test result requirements of butterfly valve Table 9 Leakage requirements of normal temperature seal test of pneumatic control valve Table 10 Leakage rate coefficient Table 11 Normal temperature performance test items and test result requirements of pneumatic control valve Table 12 Normal temperature performance test items and test result requirements of emergency shutoff valve Table 13 Leakage requirements of cryogenic seal test Table 14 Cryogenic performance test items and test result requirements of globe valve Table 15 Cryogenic performance test items and test result requirements of check valve Table 16 Cryogenic performance test items and test result requirements of ball valve Table 17 Cryogenic performance test items and test result requirements of butterfly valve Table 18 Cryogenic performance test items and test result requirements of pneumatic control valve Table 19 Cryogenic performance test items and test result requirements of emergency shutoff valve Table 20 Parameters of vibration resistance test Table 21 Parameters of impact test Table 22 Inspection items, inspection type and test requirements of globe valve Table 23 Inspection items, inspection type and test requirements of check valve Table 24 Inspection items, inspection type and test requirements of ball valve Table 25 Inspection items, inspection type and test requirements of butterfly valve Table 26 Inspection items, inspection type and test requirements of pneumatic control valve Table 27 Inspection items, inspection type and test requirements of emergency shutoff valve Table A.1 Recommended minimum length of body/bonnet extension Table C.1 Recommended materials for main parts of valves Table C.2 Chemical composition of stainless steel for liquid hydrogen Table C.3 Mechanical properties of stainless steel for liquid hydrogen at room temperature after solid solution heat treatment Table D.1 Comparison between relevant domestic and foreign standards
